Published October 31, 1995 | Version v1

Distribution, population fluctuations and natural enemies of the white peach scale, Pseudaulacaspis pentagona (Targioni Tozzetti) (Homoptera: Diaspididae) in the East Mediterranean region of Turkey

Authors/Creators

  • 1. Plant Protection Research Institute, PK21 01321 Adana, Turkey
  • 2. Department of Plant Protection, University of Çukurova, 01330 Adana, Turkey

Description

The white peach scale, Pseudaulacaspis pentagona (Targioni Tozzetti) (PP) is considered a main pest of peach orchards in the East Mediterranean region of Turkey. Peach is grown traditionally in the mountain area, but in the last two decades the number of peach orchards increased significantly in the coastal plains of the East Mediterranean region. PP is distributed in all peach-growing localities and heavy infestation occurs in orchards of the coastal plain. During this study two parasitoids — Encarsia berlesei (Howard) and Azotus perspeciosus (Girault) — and four predators — Cybocephalus fodori minor (Endrody-Younga), Chilocorus bipustulatus (L.), Rhyzobius lophanthae (Blaisdell) and Pharoscymnus pharoides Marseul — were found. The white peach scale occurs in Turkey on 14 host plants including several fruit trees, ornamental plants and some herbaceous plants under the canopy of heavily infested peach trees. Population fluctuations from November 1991 through November 1993 were observed at four locations representing two different ecological conditions. In the mountain area two distinct generations were recorded, the first in June/July and the second in September/October. In the coastal plain three generations were observed, the first in mid-April, the second in June/July and the third in October/November. PP population peaks are not followed by the parasitoid and predator populations, suggesting that the effectiveness of these natural enemies is not sufficient to control the pest.

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0075-1243 (ISSN)